Harmony organizes itself into patterns of relationships that, to a degree, can be anticipated and predicted.
These patterns are most easily seen and discussed in terms of the root motion.
The Cycle of Fifths occurs with great frequency in Western Harmony, and therefore in American Music.

The Cycle of Fifths

C

F

Bb

Eb

Ab

Db

F#

B

E

A

D

G

enharmonic spelling

B#

E#

A#

D#

G#

C#

Gb

Cb

Fb

na

na

na

This root motion pattern creates a very strong forward momentum, demonstrated in the primary dominant-to-tonic (V7-to-I) / authentic cadence, and in the sub-dominant-to-dominant-to-tonic (IIm7-to-V7-to-I) cadence.

Cadences

Dominant to Tonic

Sub-dominant to Dominant to Tonic

V7-->IG7-->C

IIm7--V7-->IDm7--G7-->C

In fact, any dominant chord completes its strongest resolution by moving one step forward through the cycle of fifths to a target.
This includes secondary and extended dominants.